The Skyscraper hitmaker surprised fans as part of a funny promotional video series for car service Lyft, and hopped into the driver's seat ahead of her August (16) gig in Denver as part of her joint Future Now Tour with Nick Jonas.

During her stint as a Lyft driver, Demi picked up unsuspecting passengers and introduced herself as "Samantha", telling them she was an aspiring singer who was desperately trying to break into the music industry.

"I've actually been traveling the country with my ex-boyfriend's brother because he sings, too," Lovato told one female passenger. "And so we really want to kind of get our names out there at open mic nights and, like, whatever we can do."

The funny video, published on, also features the singer, as Samantha, poking fun at Demi's musical talent, after one woman compliments a recent single.

"I like that Confident song. That's a jam," she commented, prompting Lovato to reply, "I like that one, but it, like, sounds like she's screaming. Selena (Gomez) is so much more talented. She's got such a better voice (sic)."

At the end of each ride, Demi took off her sunglasses to reveal her true identity, leaving her passengers in awe.

Demi briefly dated Nick's brother Joe Jonas in 2010.